若x-1的绝对值+(y+2)²=0,则（x+y）= （填数值）。（n为正整数） 若x-2的绝对值+（y+1）²=0,则y的x次方是...
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\u5143\u65e6\u5feb\u4e50
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x-1的绝对值+(y+2)²=0,x=1,y=-2
x+y=-1
1或-1
若x-1的绝对值+(y+2)²=0,则（x+y）=-1
若x-1的绝对值+(y+2)²=0,则（x+y）的次方n=1(n为偶数)
=-1 （n为奇数）
绛旓細2y鐨缁濆鍊=3锛屽垯锛寉=+3/2鎴-3/2 锛x-1锛鐨勭粷瀵瑰=3锛屽垯x=4鎴-2 xy=0锛屽垯xy鍚屽彿銆傛墍浠ワ紝x=4锛寉=3/2鎴杧=-2锛寉=-3/2
绛旓細瑙ｏ細鐢遍鎰忕煡锛x-1=y-2=0锛屾晠x=1,y=2 閭ｄ箞鍘熷紡=1/锛1*2锛+1/锛2*3锛+鈥+1/锛2011*2012锛夛紝鐢辫椤圭浉娑堟硶寰楋紝鍘熷紡=1-1/2+1/2-1/3+1/3-1/4+鈥-1/2011+1/2011-1/2012 =1-1/2012 =2011/2012
绛旓細x-1=0锛泋=1锛泍-2=0锛泍=2锛泎-3=0锛泎=3锛涙墍浠 锛圶+1锛锛圷-2锛锛圸+3锛=锛1+1锛壝楋紙2-2锛壝楋紙3+3锛=2脳0脳6 =0锛涙偍濂斤紝寰堥珮鍏翠负鎮ㄨВ绛旓紝skyhunter002涓烘偍绛旂枒瑙ｆ儜 濡傛灉鏈鏈変粈涔堜笉鏄庣櫧鍙互杩介棶锛屽鏋滄弧鎰忚寰楅噰绾 濡傛灉鏈夊叾浠栭棶棰樿閲囩撼鏈鍚庡彟鍙戠偣鍑诲悜鎴戞眰鍔╋紝绛旈涓嶆槗锛岃璋...
绛旓細瑙ｏ細鈭 |x-1|+锛坹+2)²=0 鍙堚埖|x-1|鈮0 锛坹+2)²鈮0 鈭磡x-1|+锛坹+2)²=0 x-1=0 y+2 =0 鍗 x=1 y= -2
绛旓細鍥犱负XY>0锛屾墍浠 Y鍚屽彿 锛1锛塜锛0 Y锛0鍒 X=3 Y=3,X+Y=6 (2)X锛0 Y锛0鍒 X=-1锛孻=-3锛孹+Y=-4
绛旓細鈭x-1鐨勭粷瀵瑰+y+2鐨勭粷瀵瑰+z-3鐨勭粷瀵瑰=0 鈭磝-1=0锛寉+2=0锛寊-3=0 鈭磝=1锛寉=-2锛寊=3 x+y+z=1-2+3=2 xyz=1*(-2)*3=-6
绛旓細x-1=0涓y+2=0 鎵浠 x=1 y=-2 鎵浠 x+y=-1
绛旓細瑙ｏ細缁濆鍊椤规亽闈炶礋锛屼袱闈炶礋椤逛箣鍜岀瓑浜0锛屼袱闈炶礋椤瑰潎绛変簬0 x-1=0锛寉+2=0 瑙ｅ緱x=1锛寉=-2 x+y=1+(-2)=-1 x+y鐨鍊间负-1
绛旓細|x-2y+1|=|(x-1)-2锛坹-2)-2)|鈮x-1|+2|y-1|+2鈮1+2+2=5 |(x-1)-2锛坹-2)-2)|鈮x-1|+2|y-1|+2 杩欎釜寮忓瓙绛夊彿鎴愮珛鐨勬潯浠舵槸 x-1 锛-2锛坹-2)锛-2杩欎笁涓暟鐨勭鍙风浉鍚 绗笁涓槸-2锛岄偅涔堝墠2涓兘鏄礋鍊兼椂鎵嶈兘鍙栫瓑鍙 鍙栬ˉ鍒扮瓑鍙锋眰鏈鍊煎け璐 鈭 |x-1|=1涓攟y...
绛旓細瑙ｇ瓟锛氬洜涓猴細|x-1|涓(y+3)^2浜掍负鐩稿弽鏁 鎵浠ワ細|x-1|+锛坹+3)^2=0 鍒欙細x-1=0涓攜+3=0 瑙ｅ緱锛歺=1,y=-3 鎵浠ワ細y-x-1/2=-3-1-1/2=-9/2
